JP6900646B2 - Packaging bag - Google Patents

Description

The present invention relates to a packaging bag. In particular, the present invention relates to a packaging bag that uses a plastic film as a base material, can store liquids, powders, granules, and the like as contents, and has a spout.

Packaging bags that can store liquids, powders, granules, etc. are widely used as simple substances or laminates based on a plastic film, and various forms are widely used. It is used in and has become indispensable for modern life.

For example, when it is also used as a liquid container, it is widely used in the food field such as retort pouch foods as well as beverages, and in the field of daily necessities and toiletries, various products can be used in supermarkets, drug stores, and convenience store shelves. It's busy. In this way, not only in the food field, but also as a liquid container, various uses have been developed.

The advantages of packaging bags based on plastic film are that they are cheaper than containers such as cans and bottles, that they can be handled with detailed material design depending on the required quality, or that they are before filling the contents and in distribution and storage. It is also lightweight and space-saving. Pouches can also be said to be environmentally friendly from the perspective of reducing waste.

In addition, high-definition printing on the layer that can be seen from the surface can improve the image of the product, and it is possible to display the necessary information about the contents. It is also a source of information.

Some packaging bags made of a plastic film as a base material have been commercialized and are generally called standing pouches. By giving it independence, it has become more convenient to take out the contents.

Another form of liquid container is a glass bottle or a plastic bottle, which is commonly used in the toiletry field such as detergents and shampoos. However, against the background of the recent increase in awareness of environmental problems, problems have been raised regarding the disposal and incineration of traces of the contents taken out.

In response to this, there are active movements to reduce the amount of waste and incineration of glass bottles and plastic bottles by using packaging bags made of plastic film as a base material as containers for refilling, and they have already been commercialized and are now in the world. It is beginning to penetrate.

However, taking a refillable packaging bag such as shampoo as an example, although the packaging bag is made of a plastic film as a base material, an opening for pouring is provided in one corner of the rectangular packaging bag. There was a risk of clogging the spout.

Alternatively, when trying to pour out to the end, the packaging bag is wound up diagonally from the bottom, which makes the work difficult and has a drawback that residual liquid tends to remain. In particular, since the work is performed by holding the refill packaging bag at an angle close to upside down, there have been drawbacks such as the contents spilling out of the container to be refilled and contaminating the fingers.

In order to avoid this, Patent Document 1 proposes to attach a spout of another member to form a spout portion, but in this case, a step of preparing or attaching another member is also made. The problem is that it is necessary and there are disadvantages in terms of cost and distribution.

Further, Patent Document 2, Patent Document 3, and Patent Document 4 propose that the spout portion is ribbed for the purpose of ensuring the open state of the spout, but this method also opens and pour out. Occasionally, if air does not enter the packaging bag smoothly, the open state may not be maintained and the packaging bag may be blocked.

This is a state in which the films at the spout portion are in close contact with each other and the opening is closed, and depending on the contents, the rigidity of the film may be insufficient and the effect of the rib may not be exhibited. When the viscosity of the contents was high, this was remarkable, and the workability was not always good, and a sufficient effect could not be expected.

Japanese Unexamined Patent Publication No. 5-32069 Japanese Patent No. 4617866 Japanese Patent No. 4826096 Japanese Patent No. 4816322

The present invention is intended to solve a problem that has become clear in view of such a situation, and is a packaging bag capable of easily and stably refilling a packaging bag into another container. Is an issue to be provided at low cost.

The invention according to claim 1 is a means for solving the above problems.
A packaging bag composed of a laminate having at least a base material and an innermost sealant layer.
It has a rear torso, anterior torso, and a bottom gusset.
The front torso is composed of a front lower torso and an anterior upper torso.
The left and right sides of the body and the top of the packaging bag are sealed,
The front lower body and the front upper body are above the center of the packaging bag, and the sealant layers face each other and overlap each other to form side seals and spouts on both the left and right sides, and are sealed from the front body. A spout is formed so that it can be extended to form a branch.
The branch can be overlapped with the anterior fuselage by breaking the valley fold line at the boundary of the anterior fuselage branch.
Notches are provided at both ends of the front lower body portion or the front upper body portion at positions straddling the valley fold line, and the notches extend beyond the seal portions on both the left and right sides of the body portion and are on the front side. The sealant layer on the rear fuselage and the sealant layer on the anterior upper fuselage or the anterior lower fuselage , which have a size extending to the inside of the fuselage and can be contacted by the notch when a valley fold, are formed. It is sealed and
The bottom gusset portion is a packaging bag characterized in that it is sealed with the peripheral portions of the rear side body portion and the front lower side body portion.

The invention according to claim 2 is characterized in that the shape of the notch is one of a rectangle, a circle, an ellipse, a polygon, or a plurality of combinations thereof. The packaging bag according to claim 1.

Further, the invention according to claim 3, the spout unit is characterized in that it comprises an easy opening mechanism, a packaging bag according to claim 1 or claim 2.

The invention according to claim 4 is characterized in that the spout portion is provided with a mountain fold line or a valley fold line toward the inside of the packaging bag, according to any one of claims 1 to 3. The packaging bag described.

The invention according to claim 5 is the packaging bag according to claim 4 , wherein the mountain fold line or valley fold line is provided by any of embossing, half-cut, and seal.

According to the present invention, it is possible to provide a packaging bag that can be easily and stably refilled into another container at low cost.

Further, according to the present invention, when the packaging bag is filled with the contents, the branch having the spout can be further ensured to be separated from the front body portion and the spout becomes substantially horizontal. It is possible to provide a packaging bag capable of easily and stably refilling the container at low cost.

In particular, according to the invention of claim 3, it is possible to provide a packaging bag that can be easily and stably refilled into another container at low cost and with a degree of freedom in design. It is possible.

In particular, according to the invention of claim 4, it is possible to provide a packaging bag that can be easily and stably refilled into another container, which can be easily opened and at a lower cost. Is.

In particular, according to the invention of claim 5, it is possible to provide a packaging bag that can be easily and more stably refilled into another container at a lower cost.

FIG. 1 is a schematic perspective view for explaining one embodiment of the packaging bag according to the present invention. FIG. 2 is a schematic partial cross-sectional view of a straight portion connecting points A and B shown in FIG. 1 with respect to branching of the packaging bag according to the present invention. FIG. 3 is a schematic partial cross-sectional view for explaining an embodiment different from that of FIG. 2 in a straight line portion connecting points A and B shown in FIG. 1 with respect to branching of the packaging bag according to the present invention. FIG. 4 is a schematic plan view for explaining one embodiment of the packaging bag according to the present invention. FIG. 5 is a schematic plan view for explaining another embodiment of the packaging bag according to the present invention. FIG. 6 is a schematic plan view for explaining still another embodiment of the packaging bag according to the present invention.

Hereinafter, the present invention will be described in more detail with reference to FIGS. 1 to 5. However, the present invention is not limited to the examples shown here.

FIG. 1 is a schematic perspective view for explaining one embodiment of the packaging bag according to the present invention.

The packaging bag (100) according to the present invention is made of a laminate in which a plastic film is used as a base material and a sealant layer is provided on at least one surface thereof. The packaging bag is composed of parts of a rear body (9), a front body, and a bottom (8), and the inside of the packaging bag (100) is a sealant layer.

Further, the packaging bag (100) can store the liquid contents and has the self-supporting property by expanding the bottom (8) parts by the gusset method. In the configuration, the parts of the bottom portion (8) and the rear side body portion (9) and the front lower side body portion (7) are heat-sealed and adhered to each other at the peripheral edges. In the example shown in FIG. 1, the packaging bag is rectangular, but the packaging bag is not limited to a rectangle, and for example, a part or all of both sides may be curved in an arc shape.

The front body of the packaging bag (100) is composed of a front lower body (7) and a front upper body (6), and the seals (1) on both the left and right sides of the body and the packaging bag (100). The upper part is closed by the upper heat seal (2).

Further, although not shown in FIG. 1, it is also possible to fold one laminated body to form one front lower body portion (7) and one front upper body portion (6).

The front lower body (7) and the front upper body (6) are at a height higher than the center of the packaging bag (100), and the sealant layers overlap each other so as to face each other. 4) and the spout portion (13) are heat-sealed and adhered to form a spout portion (13) overhanging from the front body portion to form a branch (10).

In the packaging bag (100) according to the present invention, the branch (10) can be folded along the valley fold line (15) before filling the contents, and can be flatly overlapped with the front body portion. In the example shown in FIG. 1, the branch (10) is folded downward by a valley fold line and filled with the contents (11).

By filling the contents, the packaging bag has a bulge and the bottom expands, allowing it to stand on its own. Further, in the upper part of the packaging bag, the valley fold line (15) at the boundary of the branch (10) of the front side body is folded, and the valleys are formed at both ends of the front lower body part (7) or the front upper body part (6). A notch is provided at a position straddling the folding line (15).

The point seal (5) is obtained by heat-sealing the cutout portion, and the details of the point seal (5) will be described later with reference to FIGS. 2 and 3.

In the present invention, the effect of providing the point seal (5) is that when the packaging bag (100) is filled with the content (11), the packaging bag (100) expands to increase its volume and at the same time, a valley. Since the end of the folded line (15) is fixed with a width by the point seal (5), the branch (10) has the effect of being lifted from the front body at an angle.

Further, the branch (10) is provided with a spout portion (13), and the packaging bag (100) can be opened by, for example, tearing the opening line (14).

In this state, by holding the center of the body of the packaging bag with fingers and applying pressure, the liquid level (12) of the contents rises, and finally enters the branch (10) to enter the spout (13). The content (11) is poured out from the opening.

This pouring transfers, for example, the contents (11) to another container, for example, because the branch (10) is lifted at an angle and is poured in the direction toward the front of the packaging bag (100). In some cases, it is not necessary to turn the packaging bag (100) upside down and lift it, which is convenient.

On the other hand, in the bottom portion (8), the bottom gusset member is provided on the rear side body portion (9) and the front lower side body portion (7) so that the width of the bottom portion can be widened by the contents (11) and can stand on its own by the gusset method. ) And the bottom heat seal (3) are bonded to each other.

FIG. 2 is a schematic partial cross-sectional view of a straight portion connecting points A and B shown in FIG. 1 with respect to branching (10) of the packaging bag (100) according to the present invention. That is, the cross-sectional view shown in FIG. 2 is a state before the point seal is performed, in which the branch (10) is folded along the valley fold line (15), and the notch (20) and the valley fold line (15) at the end of the valley fold line are shown. It is a partial cross-sectional view for explaining the relationship between the point seal (5) and the branch (10). Further, in the figure, the right direction is the upper side of the packaging bag, and the upper direction in the figure is the front side of the packaging bag.

Both points A and B are on the right side of the seal portions (1) on the left and right sides of the body portion when viewed from the drawing. Therefore, it shows a state in which the sealant layer of the rear side body portion (9) and the sealant layers of the front upper body part (6) and the front lower side body part (7) are heat-sealed and adhered to each other. There is.

Further, with the valley fold line (15) as a branch point, the sealant layers of the front upper body portion (6) and the folded front lower body portion (7) are heat-sealed so as to face each other and are heat-sealed on both the left and right sides of the branch. A side seal portion (4) is formed.

In the present invention, notches (20) are provided at both ends of the front lower body portion (7) or the front upper body portion (6) at positions straddling the valley fold line (15). In the example shown in FIG. 2, the notch (20) is provided so as to straddle the valley fold line (15) of the front lower body portion (7), and is indicated by a dotted line as the notch (20) in the figure. , The notched part is removed.

Therefore, in the notch (20) portion, the sealant layer of the rear side body portion (9) and the sealant layer of the front upper body portion (6) can come into contact with each other facing each other. This portion can be bonded by performing a heat seal (16) indicated by an arrow as a point seal (5).

By providing the point seal (5), the end portion of the branch (10) of the packaging bag (100) according to the present invention can be fixed. Further, the notch (5) can be sized to exceed the width of the seal portions (1) on both the left and right sides of the body portion and extend to the inside of the front side body portion of the packaging bag (100), and therefore the point seal (5) is also included. Further, the size can be set to reach the inside of the front body of the packaging bag (100).

Since the end of the branch (10) is fixed by the point seal (5), when the contents (11) are filled in the packaging bag (100), the packaging bag (100) swells to increase its volume. At the same time, since the end of the valley fold line (15) is fixed with a width by the point seal (5), the branch (10) has an effect of being lifted from the front body at an angle.

This is because the packaging bag (100) was inflated by filling the contents (11), and the space between the front body and the rear body (9) was pulled back and forth and folded flat. The branch (10) also becomes three-dimensional with an angle, and the valley fold line (15) is also curved with a point seal (5) because the end is fixed with a width. The valley fold will rise.

This is as schematically shown in FIG. When the branch (10) becomes three-dimensional, the air or contents inside the packaging bag enters the inside of the branch to make the branch (10) three-dimensional.

Further, the branch (10) is provided with a spout portion (13), and the packaging bag (100) can be opened by, for example, tearing the opening line (14).

In this state, by holding the center of the body of the packaging bag with fingers and applying pressure, the liquid level (12) of the contents rises, and finally enters the branch (10) to enter the spout (13). The content (11) is poured out from the opening.

This pouring transfers, for example, the contents (11) to another container, for example, because the branch (10) is lifted at an angle and is poured in the direction toward the front of the packaging bag (100). In some cases, it is not necessary to turn the packaging bag (100) upside down and lift it, which is convenient.

FIG. 3 is a schematic partial cross-sectional view of a straight line portion connecting points A and B shown in FIG. 1 with respect to branching (10) of the packaging bag (100) according to the present invention. That is, the cross-sectional view shown in FIG. 3 is a state before the point seal is performed, in which the branch (10) is folded at the valley fold line (15), and the notch (20) and the valley fold line (15) at the end of the valley fold line It is a partial cross-sectional view for explaining the relationship between the point seal (5) and the branch (10). Further, in the figure, the right direction is the upper side of the packaging bag, and the upper direction in the figure is the front side of the packaging bag.

Both points A and B are on the right side of the seal portions (1) on the left and right sides of the body portion when viewed from the drawing. Therefore, it shows a state in which the sealant layer of the rear side body portion (9) and the sealant layers of the front upper body part (6) and the front lower side body part (7) are heat-sealed and adhered to each other. There is.

Further, with the valley fold line (15) as a branch point, the sealant layers of the front upper body portion (6) and the front lower body portion (7) folded upward in the packaging bag are heat-sealed so as to face each other. , The side seal portions (4) on both the left and right sides of the branch are formed.

In the present invention, notches (20) are provided at both ends of the front lower body portion (7) or the front upper body portion (6) at positions straddling the valley fold line (15). In the example shown in FIG. 3, the notch (20) is provided so as to straddle the valley fold line (15) of the front lower body portion (7), and is indicated by the notch (20) in the drawing. The missing part has been removed.

Therefore, in the notch (20) portion, the sealant layer of the rear side body portion (9) and the sealant layer of the front upper body portion (6) can come into contact with each other facing each other. This portion can be bonded by performing a heat seal (16) indicated by an arrow as a point seal (5).

By providing the point seal (5), the packaging bag (100) according to the present invention is branched (
The end of 10) can be fixed. Further, the notch (5) can be sized to exceed the width of the seal portions (1) on both the left and right sides of the body portion and extend to the inside of the body portion on the front side of the packaging bag. Therefore, the point seal (5) is also packaged. The size can reach the inside of the front body of the bag (100).

By providing the point seal (5), the end portion of the branch (10) of the packaging bag (100) according to the present invention can be fixed. Further, the notch (5) can be sized to exceed the width of the seal portions (1) on both the left and right sides of the body portion and extend to the inside of the body portion on the front side of the packaging bag. Therefore, the point seal (5) is also packaged. The size can reach the inside of the front body of the bag (100).

Since the end of the branch (10) is fixed by the point seal (5), when the contents (11) are filled in the packaging bag (100), the packaging bag (100) swells to increase its volume. At the same time, since the end of the valley fold line (15) is fixed with a width by the point seal (5), the branch (10) has an effect of being lifted from the front body at an angle.

This is because the packaging bag (100) was inflated by filling the contents (11), and the space between the front body and the rear body (9) was pulled back and forth and folded flat. The branch (10) also becomes three-dimensional with an angle, and the valley fold line (15) is also curved with a point seal (5) because the end is fixed with a width. The valley fold will rise.

This is as schematically shown in FIG. When the branch (10) becomes three-dimensional, the air or contents inside the packaging bag can enter the inside of the branch to make the branch (10) three-dimensional.

Further, the branch (10) is provided with a spout portion (13), and the packaging bag (100) can be opened by, for example, tearing the opening line (14).

In this state, by holding the center of the body of the packaging bag with fingers and applying pressure, the liquid level (12) of the contents rises, and finally enters the branch (10) to enter the spout (13). The content (11) is poured out from the opening.

This pouring transfers, for example, the contents (11) to another container, for example, because the branch (10) is lifted at an angle and is poured in the direction toward the front of the packaging bag (100). In some cases, it is not necessary to turn the packaging bag (100) upside down and lift it, which is convenient.

The shape of the notch (20) can be one of a rectangle, a circle, an ellipse, a polygon, or a combination of a plurality of them, and the shape is not limited, and the design is flat as well as the design. The folded branch (10) becomes angled and three-dimensional by filling the contents (11), and the valley fold line (15) is also wide and fixed at the end with a point seal (5). Therefore, as long as the valley fold is raised in a curved state when viewed from the front, a free shape may be taken.

FIG. 4 is a schematic plan view for explaining one embodiment of the packaging bag according to the present invention.

As shown here, the packaging bag according to the present invention can be folded flat when the contents are not filled. The branch (10) is folded toward the lower side of the front torso with the valley fold line (15) as a boundary. The bottom part (8) is also folded by heat-sealing the bottom part.

Further, the spout portion may be provided with an opening line (14) capable of opening the spout, and an easy opening mechanism capable of easily opening the spout with fingers can be provided. The easy-opening line can be composed of, for example, a notch (17) that triggers opening, a half-cut line that follows, and the like.

The packaging bag according to the present invention is made of a laminate having a plastic film as a base material and a sealant layer on one side, and the elements constituting the laminate will be described below.

(Plastic film)
The plastic film is a film made of a polymer resin composition, for example, polyolefin (polyethylene, polypropylene, etc.), polyester (polyethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate, etc.), polyamide (nylon-6, nylon-66, etc.), polyimide. Etc. can be used and are appropriately selected according to the application. In particular, when polypropylene or polyethylene terephthalate is used as the base film, it is more preferable in terms of film strength and price.

(Sealant layer)
Of the thermoplastic resins, polyolefin resins are generally used as the material of the sealant layer. Specifically, low-density polypropylene resin (LDPE), medium-density polypropylene resin (MDPE), and linear low-density polyethylene resin. (LLDPE), ethylene-vinyl acetate copolymer (EVA), ethylene-α-olefin copolymer, ethylene-methacrylic acid resin copolymer and other ethylene-based resins, polyethylene-polybutene blend resin, homopolypropylene resin Polypropylene resins such as (PP), propylene-ethylene random copolymer, propylene-ethylene block copolymer, and propylene-α-olefin copolymer can be used.

FIG. 5 is a schematic plan view for explaining another embodiment of the packaging bag according to the present invention.

The example shown here is an example characterized in that the spout portion is provided with a mountain fold line or a valley fold line (18) extending from the spout toward the packaging bag side. The mountain fold line or valley fold line (18) can increase the rigidity of the laminate constituting the branch (10) in the direction perpendicular to the mountain fold line or valley fold line (18).

That is, in the pouring portion (13) of the packaging bag (100) that has been opened and the opening appears, when the liquid of the content (11) is poured, it functions as a rib to prevent the opening from being closed. It is possible.

FIG. 6 is a schematic plan view for explaining still another embodiment of the packaging bag according to the present invention.

The example shown here is an example in which the branch (10) is folded above the packaging bag (100) with the valley fold line (15) as a boundary. In this case, it is an example of the point seal (5) shown in FIG. Further, the example shown here is an example characterized in that the spout portion is provided with a mountain fold line or a valley fold line (18) extending from the spout toward the packaging bag side.

The mountain fold line or valley fold line (18) can increase the rigidity of the laminate constituting the branch (10) in the direction perpendicular to the mountain fold line or valley fold line (18). That is, in the pouring portion (13) of the packaging bag (100) that has been opened and the opening appears, when the liquid of the content (11) is poured, it functions as a rib to prevent the opening from being closed. It is possible.

The mountain fold line or valley fold line (18) toward the inside of the packaging bag can be provided by embossing, half-cutting, or sealing.

Further, in the present invention, it is not necessary to attach a separate member to the spout portion, and the packaging bag is excellent in terms of cost. Further, the spout portion may be provided with an opening line (14) capable of opening the spout. The opening line (14) can be provided with an easy-opening mechanism that can be easily opened by using fingers. The easy-opening mechanism can be composed of, for example, a notch (17) that triggers opening, and a half-cut line of the laminated body of the packaging bag that follows.

That is, by providing the easy-opening mechanism, the opening work can be performed more easily and stably, and for example, the transfer work of the contents can be performed more easily and stably.

As described above, according to the present invention, it is possible to provide a packaging bag at low cost, which can easily and stably refill the packaging bag into another container.

Hereinafter, the present invention will be described in more detail by way of examples. However, the present invention is not limited to the examples shown here. The present invention is limited by the claims.

<Example 1>
The shape is the packaging bag according to the present invention shown in FIG.
The material composition is as follows.
Body member: Stretched polyamide film (thickness 15 μm) / thin-film vapor-deposited polyethylene terephthalate film (thickness 12 μm) / linear low-density polyethylene resin (thickness 100 μm).
Bottom member: Stretched polyamide film (thickness 15 μm) / linear low-density polyethylene resin (thickness 100 μm).
The opening line (14) was a half-cut line obtained by laser processing.
The contents were filled with 340 ml of household shampoo and sealed with an upper heat seal (2).

<Comparative example 1>
The only difference compared to Example 1 is that there is no point seal.

<Comparative example 2>
Compared with Example 1, there are two differences: there is no point seal, and a convex mountain fold line or valley fold line is provided as a rib in the center of the spout of the branch.

The following evaluation items were set for each test piece to be refilled.
Presence / absence of liquid spill The remaining amount refilling time was evaluated at n = 5.

The evaluation results are shown in Table 1.

As is clear from the results shown in the table, the packaging bag of Example 1 according to the present invention was verified to be excellent in all items of presence / absence of spillage, remaining amount, and refilling time.
That is, since the spout is three-dimensional after opening, the workability is excellent and the refilling time is the shortest. In addition, since the spout was not blocked during the work, no liquid spill was caused and the remaining amount was small, which was a good result.

In the packaging bag of Comparative Example 1, the opening was not held three-dimensionally at the spout of the branch, and liquid spillage was observed due to the refilling work while keeping the opening in close contact. As a result, the work became unstable and the refilling time became long.

In the packaging bag of Comparative Example 2, the opening was not held three-dimensionally at the spout of the branch as in Comparative Example 1, and liquid spillage was observed due to the refilling work while keeping the opening in close contact.

The spout was less likely to break than in Comparative Example 1, but it took time to sail the opening after opening, resulting in a longer refilling period than in Example 1. As for the remaining amount, the liquid was accumulated by providing the convex mountain fold line or the valley fold line as ribs, resulting in a large amount of remaining amount.

As described above, according to the present invention, it is possible to verify that it is possible to provide a packaging bag that can be easily and stably refilled into another container at low cost. did it.

1 ... Seals on both left and right sides of the body 2 ... Top heat seal 3 ... Bottom heat seal 4 ... Side seals on both left and right sides of the branch 5 ... Point seal 6 ... Front upper body 7 ... Front lower body 8 ... Bottom 9 ... Rectangular rear body 10 ... Branch 11 ... Contents 12 ... Liquid level of contents 13 ... Spout 14 ... Opening line 15 ... Taniori line 16 ... Heat seal 17 ... Notch 18 ... Yamaori line or Taniori line 100 ... Packaging bag

Claims (5)

A packaging bag composed of a laminate having at least a base material and an innermost sealant layer.
It has a rear torso, anterior torso, and a bottom gusset.
The front torso is composed of a front lower torso and an anterior upper torso.
The left and right sides of the body and the top of the packaging bag are sealed,
The front lower body and the front upper body are above the center of the packaging bag, and the sealant layers face each other and overlap each other to form side seals and spouts on both the left and right sides, and are sealed from the front body. A spout is formed so that it can be extended to form a branch.
The branch can be overlapped with the anterior fuselage by breaking the valley fold line at the boundary of the anterior fuselage branch.
Notches are provided at both ends of the front lower body portion or the front upper body portion at positions straddling the valley fold line, and the notches extend beyond the seal portions on both the left and right sides of the body portion and are on the front side. The sealant layer on the rear fuselage and the sealant layer on the anterior upper fuselage or the anterior lower fuselage , which have a size extending to the inside of the fuselage and can be contacted by the notch when a valley fold, are formed. It is sealed and
A packaging bag characterized in that the bottom gusset portion is sealed with the peripheral portions of the rear side body portion and the front lower side body portion. The packaging bag according to claim 1, wherein the shape of the notch is one of a rectangle, a circle, an ellipse, a polygon, or a combination thereof. The packaging bag according to claim 1 or 2 , wherein the spout portion is provided with an easy-opening mechanism. The packaging bag according to any one of claims 1 to 3 , wherein the spout portion is provided with a mountain fold line or a valley fold line toward the inside of the packaging bag. The packaging bag according to claim 4 , wherein the mountain fold line or valley fold line is provided by any of embossing, half-cut, and seal.

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